perfusorius/ndoc — comment on commit 7313e96f932bccd7ce4894892bf673b5876762d7
File:  line 0
By perfusorius:

A few lines below this function you call it: interpolate(opts.title);
There is no second parameter "file" given, so without this the code would throw an error.
I don't know now if there are more calls to it.
It would also be possible to catch this with file = file || ''.